York YZF User Manual

835966-UIM-E-0814
OUTDOOR SPLIT-SYSTEM HEAT PUMP
MODELS:
16 SEER - YZF, HC6B, HL6B SERIES
18 SEER - YZH, HC8B, HL8B SERIES
2 TO 5 TONS
INSTALLATION MANUAL
®
LIST OF SECTIONS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
INDOOR EXPANSION DEVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SYSTEM START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
INSTRUCTING THE OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF FIGURES
Typical Installation with Required Clearances . . . . . . . . . . . . . . . . . . . . . . 2
Tubing Hanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Communications Harness Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Communicating HP with Communicating Air Handler or Furnace . . . . . . . 8
Communicating HP with Non-Communicating Air Handler
or Furnace using Communicating Interface Control . . . . . . . . . . . . . . . . . . 8
Multi-wire Terminal Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . 10
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – Single Stage Furnace (X-13) . . . . . . . . . . . . . . . . . 11
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – V/S Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – PSC Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – V/S Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Thermostat Wiring – Two-Stage Heat Pump -
Two-Stage Variable Speed Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Thermostat Wiring – Two-Stage Heat Pump -
Two-Stage Variable Speed Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Heat Pump Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Wiring Diagram - Single Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Wiring Diagram - 2 Stage with PSC Outdoor Fan Motor . . . . . . . . . . . . . 24
Wiring Diagram - 2 Stage with ECM Outdoor Fan Motor . . . . . . . . . . . . . 25
LIST OF TABLES
Maximum / Minimum Operating Limit Conditions . . . . . . . . . . . . . . . . .2 R-410A Saturation Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Defrost Initiate Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SECTION I: GENERAL
The outdoor units are designed to be connected to a matching indoor
coil with sweat connect lines. Sweat connect units are factory charged
with refrigerant for the smallest rated indoor coil plus 15 feet of field
supplied lines.
Matching indoor coils require a thermostatic expansion valve. The
refrigerant charge may need to be changed for some indoor-outdoor
unit combinations, elevation differences, or total line lengths. Refer to
Application Data covering “General Piping Recommendations and
Refrigerant Line Length” (Part Number 247077).
SECTION II: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury
.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury
.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury
. It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or maintenance
can cause injury or property damage. Refer to this manual for assis-
tance or for additional information, consult a qualified contractor,
installer or service agency.
This product must be installed in strict compliance with the enclosed
installation instructions and any applicable local, state, and national
codes including, but not limited to building, electrical, and mechanical
codes.
R-410A systems operate at higher pressures than R-22 systems. Do
not use R-22 service equipment or components on R-410A equip-
ment. Service equipment
Must Be Rated for R-410A.

York YZF Specifications

General

Model Number	YZF
Category	Heat Pump
Efficiency (COP)	Up to 4.0
Refrigerant	R-410A
Compressor Type	Scroll
Operating Range (Heating)	75°F

Summary

SECTION I: GENERAL

Maximum / Minimum Operating Limit Conditions

Specifies the operational temperature ranges for the outdoor and indoor coils.

SECTION II: SAFETY

Ground Installation Safety

Guidelines for installing the unit at ground level to prevent leaks and ensure stability.

Roof Installation Safety

Requirements for installing units on a roof, focusing on structural support and sound transmission.

Wall Mount Installation Safety

Considerations for mounting units on walls, including stability and vibration isolation.

Unit Placement Safety

Instructions for positioning the outdoor unit, considering drainage and potential hazards.

Liquid Line Filter-Drier Importance

Importance of using the correct filter-drier to prevent equipment damage.

SECTION III: UNIT INSTALLATION

Location Requirements

Criteria for selecting suitable locations for indoor and outdoor units, including clearances.

Add-On Replacement/Retrofit Procedures

Steps for replacing R-22 systems with R-410A, including component changes.

Precautions During Line Installation

Guidelines for installing refrigerant lines, minimizing bends and ensuring proper insulation.

SECTION IV: INDOOR EXPANSION DEVICE

Thermostatic Expansion Valve (TXV) Installations

Basic steps and precautions for installing the TXV kit on the indoor coil distributor.

SECTION V: EVACUATION

SECTION VI: SYSTEM CHARGE

Measure Indoor Air Flow

Procedure to determine and set the correct indoor airflow for optimal system performance.

Charging the Unit

Instructions and cautions for charging the system with refrigerant, emphasizing proper methods.

SECTION VII: ELECTRICAL CONNECTIONS

General Information & Grounding

Requirements for electrical supply, grounding, and wiring standards.

Field Connections Power Wiring

Steps for connecting the main power wiring to the unit, including disconnect switch.

Field Connections Control Wiring - Conventional

Wiring instructions for conventional thermostat connections to the control box.

Field Connections Control Wiring - Communicating

Wiring instructions for communicating thermostat connections using the communication harness.

SECTION VIII: SYSTEM START-UP

Energize Crankcase Heater

Procedure to energize the crankcase heater before compressor start-up.

Cooling Position Operation

Describes the system's operation during the cooling cycle with continuous blower.

Defrost Operation

Explains defrost curve selection based on jumper positions for different models.

SECTION IX: SYSTEM OPERATION

Required Control Setup

Steps for setting up controls to ensure proper system operation and performance.

Heat Pump Flow Diagram

Visual representation of the refrigerant flow during cooling and heating cycles.

SECTION X: INSTRUCTING THE OWNER

Maintenance Procedures

Guidance on cleaning outdoor coils, fan motors, and indoor components for optimal performance.

SECTION XI: WIRING DIAGRAM

Wiring Diagram - Single Stage

Schematic showing electrical connections for single-stage heat pump systems.

Wiring Diagram - 2 Stage PSC Fan Motor

Schematic illustrating electrical connections for 2-stage heat pumps with PSC fan motors.

Wiring Diagram - 2 Stage ECM Fan Motor

Schematic detailing electrical connections for 2-stage heat pumps with ECM fan motors.

SECTION XII: START UP SHEET